Added auth (login/logout) system

internal/sessions.go

@@ -0,0 +1,51 @@
+package internal
+
+import (
+	"crypto"
+	"fmt"
+	"hash"
+	"time"
+)
+
+type Session struct {
+	Token               hash.Hash `json:"token"`
+	ExpirationTimestamp int64     `json:"expirationTimestamp"`
+}
+
+var SESSIONS []Session
+
+const SESSION_DURATION int64 = 3600
+
+func generateSessionToken(user User) hash.Hash {
+	token := crypto.SHA256.New()
+	stringToHash := fmt.Sprintf(user.Email + user.Password)
+	token.Write([]byte(stringToHash))
+	return token
+}
+
+func isSessionExpired(session Session) bool {
+	return session.ExpirationTimestamp < time.Now().Unix()
+}
+
+func addSession(user User) {
+	SESSIONS = append(SESSIONS, Session{
+		Token:               generateSessionToken(user),
+		ExpirationTimestamp: time.Now().Unix() + SESSION_DURATION,
+	})
+}
+
+func removeSession(user User) {
+	index := 0
+	sessLen := len(SESSIONS)
+	for i := 0; i < sessLen; i++ {
+		if SESSIONS[i].Token == generateSessionToken(user) {
+			index = i
+			break
+		}
+	}
+	fmt.Println(SESSIONS)
+	SESSIONS[index] = SESSIONS[sessLen-1]
+	SESSIONS[sessLen-1] = Session{} //TODO PAS SUR QUE ÇA FONCTIONNE
+	SESSIONS = SESSIONS[:sessLen-1]
+	fmt.Println(SESSIONS)
+}